condition mean min max 4 h after light 3473.1 3473.1 3473.1 8 h after light 3276.15 3053.3 3499.0 12 h after light 3141.7 3064.2 3219.2 4 h after dark 2682.8 2365.5 3000.1 8 h after dark 2530.0 2248.4 2811.6 12 h after dark 2501.5 2087.9 2915.1